Undyne and Alphys's House is a new location in AnomolyTale, replacing Undyne's house.
Here, Alphys and Undyne watch anime on the TV. Undyne also trys to play the piano there. They also eat food made by Undyne at the table.
Undyne and Alphys both sleep there and 'do it' ( ͡° ͜ʖ ͡°).